Finally hit sub 21, what a journey.

This was the cleanest run, only gold rocks and even better execution will save time.

I believe this build on this seed is on the limit of what is possible.

Thanks to Sole & Macros for words of advice. Thanks to the entire factorio speed run community for being awesome.

734 runs

LAB 3:29 RED SCI 10:56 GREEN SCI 13:27 LOCO 19:52 WR 20:58.86